21630300663 has 8 divisors (see below), whose sum is σ = 30358316800. Its totient is φ = 13661242488.

The previous prime is 21630300617. The next prime is 21630300689. The reversal of 21630300663 is 36600303612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21630300663 - 2⁶ = 21630300599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21630300663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21630300463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189739423 + ... + 189739536.

It is an arithmetic number, because the mean of its divisors is an integer number (3794789600).

Almost surely, 2^21630300663 is an apocalyptic number.

21630300663 is a deficient number, since it is larger than the sum of its proper divisors (8728016137).

21630300663 is a wasteful number, since it uses less digits than its factorization.

21630300663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379478981.

The product of its (nonzero) digits is 11664, while the sum is 30.

The spelling of 21630300663 in words is "twenty-one billion, six hundred thirty million, three hundred thousand, six hundred sixty-three".